Power mechanism



1,643,041 Sept. 20, 1927- A F WILLIAMS POWER MECHANI SM Filed Jan. 13.1926 Patented sept. zo, 1927.

UNITEDtsTATEs PATENT OFFICE.

-ANTHONY E. WILLIAMS, lor' ROCHESTER, NEW YORK, AssIGNon. To NORTH EnsTAP- PLIANCES INC., or ROCHESTER, NEW YORK, A CORPORATION OF NEW YORK.

POWER MEOHANISM.

' member is used, this member being profollowers, or actuating members,connected priate key, `into engagement with the rotary power-mem videdwith shoulders or abutments adapted to Vcooperate with any one of aseries of respectively with the several type-bars, or other elements ofthe machine, .which are to be actuated. To cause the actuation of atype-bar, the corresponding actuator is moved, through the depression ofan appropower-member, and is pulled thereby through the space necessaryto actuate the type-bar, being then automatically released and permittedto return. -A machine ofv this type is shown, for example, in UnitedStates Letters Patent No. 1,199,824 to Schlns.-

In machines having the described mode of operation, the several elementsabove referred to have heretofore been made rigid in their structure, sothat to avoid in]ury to the mechanism, it has been found necessary toprovide interlocking means to prevent the simultaneous depression ofvtwo keys, since injury would result if. the two type-bars were to beactuated simultaneously and to interfere in their movements.

The object of the present invention is to rovide, in a simple andeiective manner,

or a suiiicient degree of elasticity in the power mechanism to preventinjury in the case of simultaneous operation of two type- 'bars, orother parts, which -are to be actuated;- and also to free the mechanismfrom the strain and wear incidental to the rapid operation of rigidparts.

To the foregoing end it is proposedto in- `terpose a yielding element inthe rotary er. This 'is accomplished by making the toothed or tintedperipheral portion se arate from the rigi central part, or sha and.interposing between these parts a body of rubber, or other' suitableyielding but resilient material, so that a slight relative rotary'motion ofthe outer and inner parts of the power-member may occur', inconsequence of the reaction of the actuator against the power-member.The

invention will be more fully set forth in the applicati@ med Jennery 1s,192s. .serial No. $1,126.

description of the illustrated embodiment thereof. In the accompanyingdrawings, Fig. 1 1s a Aside-elevation of a power mechanism `embodyingthe present inventiomshowing one assembl of type-bar, ke and actuatingmechanism, together wit a sectional view of the rotary power-member.Fig. 2 is a front-elevation, partly in section, of one end of the rotarypower-member.

The inventionillustrated is embodied in a typewriter, having a type-bar5 pivoted at 6 and actuated, in a well known manner,

by means of an upright lever 7. The lever `is mounted on a stationarypivot 8,. and is connected with n the type-bar by a sliding pm 9.

, The rotary power-member 10 has the us- I ual toothed or liuted form,`and turns constantly in a clockwise direction. The actuator 11 is inthe form of a bar pivoted at its rear end to the lever 7,' and providedwith a hook-like forward end. This actuator is normally held in itsupper position, resting against a stop-bar 12, by .means of -a spring13.

The key-lever 14 is mounted on-a pivot 15 at its rear end, and heldnormally in raised position by a `spring 16. A trip-17,

connected with the key-lever at its lower end by means of a pin 18, hasa hooked upper end which bears against ai'lateral lug 19 i on theactuator 11; and a spring' 20, connecting the trip with the key-lever,holds the trip normally in its forward position, resting agalnst astop-lug 21'son the keylever. When the key is depressed the trip lpullsthe actuator downwardly, so that its ooked end engages one of theabutments on the power-member, whereupon the -actuator is pulledforwardly, thus swinging the lever 7 and actuating the'type-bar. Thisforward movement of the actuator is limited by means of a bar 22, whichis engaged by the beveled forward end ofthe actuator,v thus causing thelatter to rise out lof engagement with theepower-memb'er'. During thesame forward movement, the ,lug 19l is moved out of engagement with thetrip 17, so that the spring 13 holds the actuator up against the rod 12while the actuator returns to its original position. When the key isreleased, the trip 17 snaps back into engagement with the lug 19, readyfor a renewed operation The mechanism j ust described is not noveL,

' e body 2st, of soit' or semi-sott rubber is mounted. To cause therubber ;to rotate with the shaft, the latter is iluted, or other- Wiseroughened, and the rubber is proton ably moulded upon the shalt. lhefluted or toothed periphery of the power-member, instead otconsistinggot a singlecontinuous body, is made of a series ci' toothedrings, placed close together along the length ofthe power-member.rlluise consist preferably oi hardened steel, and should Abe of athickness such as to correspond With the lateral spec ing ci theactuators, so that there is u ring corresponding' to each actuator. Untheir inner surfaces the rings are toothed or roughened, togive a securegrip on the rubber 24.

Preferably, the rings and the shatnre held in correct relation in asuitable mould, .sind the rubber 242 is moulded und vulcanized in placebetween them.

ing movement, thus causing the movement .35'

to be fully performed, unless some interference occurs inthe mechanism,which prevents the 'type-bar from makingy a full stroke.

'lhe invention claimed is:

l. A. rotary power member, for cooperation with typeebar actuators orythe like, comprising: a, rigid central shaft, a series ot toothed ringsconcentric with said shaft, and a body of yielding resilient materialinterposed between and rotatvely connecting said shaft and rings.

A2. il rotary power member, for cooperation with type-ber actuators orthe like,

comprising: a tinted metal shaft, a series of 50 contiguous motel ringsprovided With both inner and outer teeth, sald rings being concentricwith seid shaft, and a body of soft rubber interposed between the shaftand the rings and interlocked therewith.

' ANTHNY F. WILLIAMS.

